Fraud offences in the UK are changing. The Economic Crime and Corporate Transparency Act 2023 (ECCTA) creates a new "failure to prevent fraud" offence, committed when an employee of a large organisation perpetrates a fraud and the organisation has failed to implement reasonable fraud prevention measures. ECCTA also reforms the identification principle, making it easier to attribute criminal liability to corporations for economic crimes committed by a 'senior manager' acting within the actual or apparent scope of their authority. This represents a substantial widening of potential liability, as the definition of senior manager is broader than the board of directors and may include any individual with substantial management authority. ECCTA brings a greater risk of corporate and D&O prosecutions, and therefore organisations must implement robust fraud prevention procedures and safeguards to oversee the conduct of their senior managers. The consequences of non-compliance will otherwise be severe.